Cyperaceae
Leaf sheath closed or rarely open and then the perianth reduced to bristles or minute scales Cyperaceae
Flowers unisexual, female flowers enclosed in a flask-shaped utricle (Fig. 46 e,g) or in separate spikelets
Spikes with long pedicel, usually pendulous in the fruiting stage. Utricle never corky but with a prominent beak 2 mm long or longer
Spikes clustered at nodes, 6–20 per culm
Female pseudoglumes yellow-brown to red-brown, 1.5–2 mm wide; acuminate, ascending. Female spike 3–5 mm diam at maturity. Utricle c. 1.5 mm diam., with prominent veins, 3-angular; beak ascending to erect, 2–2.5 mm long, very slightly notched to entire. Culms 40–80 cm high. Leaves 2–4 mm wide. Widespread. Swamps and creek banks Carex longebrachiata
Female pseudoglumes pale yellow-brown, 2.5–4 mm wide, aristate, ascending. Female spike 5–8 mm diam at maturity. Utricle c. 1.5 mm wide with prominent veins, 3-angular; beak ascending to erect, 1–1.5 mm long, apex notched. Culms 20–100 cm high. Leaves 3–6 mm wide. Blue Mts Swamps and creek banks Carex iynx